S = input()

if S[0] =="R" and S[1] == "R" and S[2] == "R":
  print(3)
  
elif (S[0] =="R" and S[1] == "R") or (S[1] == "R" and S[2] == "R"):
  print(2)
  
elif S[0] =="R" or S[1] == "R" or S[2] == "R":
  print(1)
  
else:
  print(0) S = input() S input() input if S[0] =="R" and S[1] == "R" and S[2] == "R":
  print(3)
  
elif (S[0] =="R" and S[1] == "R") or (S[1] == "R" and S[2] == "R"):
  print(2)
  
elif S[0] =="R" or S[1] == "R" or S[2] == "R":
  print(1)
  
else:
  print(0) S[0] =="R" and S[1] == "R" and S[2] == "R" S[0] =="R" and S[1] == "R" S[0] =="R" S[0] S 0 "R" S[1] == "R" S[1] S 1 "R" S[2] == "R" S[2] S 2 "R" print(3) print 3 elif (S[0] =="R" and S[1] == "R") or (S[1] == "R" and S[2] == "R"):
  print(2)
   (S[0] =="R" and S[1] == "R") or (S[1] == "R" and S[2] == "R") S[0] =="R" and S[1] == "R" S[0] =="R" S[0] S 0 "R" S[1] == "R" S[1] S 1 "R" S[1] == "R" and S[2] == "R" S[1] == "R" S[1] S 1 "R" S[2] == "R" S[2] S 2 "R" print(2) print 2 elif S[0] =="R" or S[1] == "R" or S[2] == "R":
  print(1)
   S[0] =="R" or S[1] == "R" or S[2] == "R" S[0] =="R" or S[1] == "R" S[0] =="R" S[0] S 0 "R" S[1] == "R" S[1] S 1 "R" S[2] == "R" S[2] S 2 "R" print(1) print 1 print(0) print 0 S = input() input() S
S = input()

if S[0] =="R" and S[1] == "R" and S[2] == "R":
  print(3)
  
elif (S[0] =="R" and S[1] == "R") or (S[1] == "R" and S[2] == "R"):
  print(2)
  
elif S[0] =="R" or S[1] == "R" or S[2] == "R":
  print(1)
  
else:
  print(0)